 //下面用于多图片上传预览功能
   
 function setImagePreviews(avalue) {

  var docObj = document.getElementById("doc");

  var dd = document.getElementById("dd");

  dd.innerHTML = "";

  var fileList = docObj.files;

  for (var i = 0; i < fileList.length; i++) { 
    dd.innerHTML += "<div style='float:none;text-align: center;' > <img id='img" + i + "'  /> </div>";

    var imgObjPreview = document.getElementById("img" + i);

    if (docObj.files && docObj.files[i]) {

      //火狐下，直接设img属性

      // imgObjPreview.style.display = 'block';

      imgObjPreview.style.width = '150px';

      imgObjPreview.style.height = '150px';

      //imgObjPreview.src = docObj.files[0].getAsDataURL();

      //火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式

      imgObjPreview.src = window.URL.createObjectURL(docObj.files[i]);

    } else {

      //IE下，使用滤镜

      docObj.select();

      var imgSrc = document.selection.createRange().text;

      alert(imgSrc)

      var localImagId = document.getElementById("img" + i);

      //必须设置初始大小

      localImagId.style.width = "150px";

      localImagId.style.height = "150px";

      //图片异常的捕捉，防止用户修改后缀来伪造图片

      try {

        localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";

        localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;

      } catch (e) {

        alert("您上传的图片格式不正确，请重新选择!");

        return false;

      }

      imgObjPreview.style.display = 'none';

      document.selection.empty();

    }

  }



  return true;

}